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Defend Earth from alien invaders
Activities performed in response to internal and external stimuli.
A daily rhythmic activity cycle, based on 24-hour intervals, that is exhibited by many organisms.
Conditioning in which the conditioned stimulus is paired with and precedes the unconditionedstimulus until the conditioned stimulus alone is sufficient to elicit the response.
Transmission of information between organisms.
Interaction between individuals of the same or different species that use one or more of the same resources.
Plants that flower regardless of the length of day.
Response of a root or shoot towards or against gravity.
The gradual decline of a response to a stimulus resulting from repeated exposure to the stimulus.
The ability for some plants to move so that they remain either perpendicular or parallel to the sun's rays throughout the day. Also called solar tracking.
Rapid learning that occurs during a brief receptive period, typically soon after birth or hatching, and establishes a long-lasting behavioral response to a specific individual or object, as attachment to parent, offspring, or site.
Behaviour that is genetically predetermined or 'inborn'.
Complex form of learnt behaviour whereby an individual applies past experience to find solutions to new problems.
Behaviours that develop or change as a result of experience.
Plants which flower when the length of day increases to a particular critical point.
The seasonal movement of a complete population of animals from one area to another.
Plant movement in which the direction of movement is independent of the direction of the stimulus causing the movement. For example the opening and closing of flowers over a 24 hour period.
A process of behavior modification or conditioning in which the likelihood of a specific behavior is increased or decreased through positive or negative reinforcement each time the behavior is exhibited, so that the subject comes to associate the pleasure or displeasure of the reinforcement with the behavior.
A chemical substance released by an animal that serves to influence the physiology or behavior of other members of the same species.
The relative length of day over a 24 hour period.
Behaviours which are repeated at regular intervals.
Planta that flower when the length of day decreases to a particular critical point.
The different ranks of importance or dominance within an animal group. A pecking order.
Ability of some plants to track the sun. Also called heliotropism.
Plant response to contact with a solid object.
Directional growth of a plant in response to an environmental stimulus.
Movement of a plant in response to light.
Direction growth of a plant towards an environmental stimulus.
Direction of growth of a plant away from an environmental stimulus.
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